The Prompt Index
Discover and optimize AI prompts with a curated database of 700+ prompts and built-in AI tools like Humanizer and Optimizer.
| What is it | Discover and optimize AI prompts with a curated database of 700+ prompts and built-in AI tools like Humanizer and Optimizer. |
|---|---|
| Pricing | Paid — from $9.99/mo |
| Free tier | Yes |
| Platform | Web Application |
| Best for | finding effective prompts for AI chatbots, making AI-generated text undetectable |
| Domain registered | 2023 |
Data updated Aug. 1, 2026
What does The Prompt Index do?
The Prompt Index is a comprehensive platform that serves as a central hub for AI prompt discovery and optimization. It offers a searchable database of over 700 community-curated prompts for models like ChatGPT, Claude, and Gemini, alongside a suite of built-in tools to work with AI-generated content. You can browse prompts by category, see what's trending, and find the right starting point for your specific task, whether it's creative writing, business analysis, or coding.
The platform stands out by combining its extensive prompt library with practical utilities. Its 'AI Toolbox' includes an AI Humanizer to make generated text sound more natural, a Prompt Optimizer to refine your instructions for better results, and AI Labs for testing prompts across hundreds of different AI models. It also features PromptShare for securely sharing prompts with teams and private folders for organization. It's more than just a directory; it's a workspace for prompt engineering.
This tool is ideal for content creators, marketers, developers, and anyone who regularly uses AI chatbots and wants to improve their output efficiency and quality. Real-world use cases include a marketer quickly finding a proven prompt for generating ad copy, a student using the humanizer to polish an AI-assisted essay, or a developer testing a complex instruction set across multiple models in AI Labs to find the most reliable one.
Key features
What makes it stand outWho is The Prompt Index for?
Who benefits most from this toolPricing
Free tier available — start without a credit cardFree Plan
- 1 books monthly
- 1 pdf ocr daily
- 10 prompts saved
- 1 private folders
- 10 sound effects daily
- 10 AI humanizer monthly
- 1 cover images monthly
- 2 image extender daily
- 2 image to image daily
- 1 image upscaler daily
- 10 song credits monthly
- 50 voice minutes monthly
- 2 image inpainting daily
- 2 prompt optimizer daily
- 2 AI backing tracks daily
- 1 watermark remover daily
- 2 background remover daily
- 10 AI writing assistant monthly
- Access To Prompt Library
- Access To Daily Research Paper Breakdowns
- Access To Free Courses Only
- Limited Access To AI Labs
- Limited Access To AI Rooms
- SoundLabs AI Music Tools
- Professional Image Tools Suite
- AI Writing Assistant
- Save Prompts To Profile
- Organize and Share Prompts
- Private Folders
- AI Humanizer
- Prompt Optimizer
- PDF OCR Text Extractor
- PromptBook AI Book Generator
Basic Plan
Everything in Free Plan, plus:
- 3 books monthly
- 2 pdf ocr daily
- 10 private folders
- 80 AI rooms monthly
- 50 sound effects daily
- 100 AI humanizer monthly
- 3 cover images monthly
- 4 image extender daily
- 5 image to image daily
- 3 image upscaler daily
- 50 song credits monthly
- 250 voice minutes monthly
- 5 image inpainting daily
- 5 prompt optimizer daily
- 10 AI backing tracks daily
- 3 watermark remover daily
- 5 background remover daily
- 100 AI writing assistant monthly
- Everything In Free
- Access All Courses
- Access To Basic Members Area - Exclusive Resources
- Full Access to AI Labs
- Full Access to AI Rooms
- Enhanced SoundLabs AI Music
- Professional Image Tools Suite
- Unlimited Prompts Saved To Your Profile
- Private Folders
- AI Writing Assistant
- Prompt Builder Access
- AI Humanizer
- Prompt Optimizer
- PDF OCR Text and Image Extractor
- PromptBook AI Book Generator
- Early Access To Latest Tool Releases
- No Ads
Pro Plan
Everything in Basic Plan, plus:
- 10 books monthly
- 5 pdf ocr daily
- 250 AI rooms monthly
- 100 sound effects daily
- 1,000 AI humanizer monthly
- 10 cover images monthly
- 12 image extender daily
- 15 image to image daily
- 10 image upscaler daily
- 100 song credits monthly
- 500 voice minutes monthly
- 15 image inpainting daily
- 50 prompt optimizer daily
- 20 AI backing tracks daily
- 10 watermark remover daily
- 15 background remover daily
- 500 AI writing assistant monthly
- Everything In Basic
- Access To Pro Members Area - Exclusive Resources
- Unlimited Private Folders
- Unlimited AI Powered Prompt Builder
- Full Access to AI Rooms
- Professional SoundLabs AI Music
- Professional Image Tools Suite
- AI Writing Assistant
- AI Humanizer
- Prompt Optimizer
- PDF OCR Text and Image Extractor
- PromptBook AI Book Generator
- One on One support Via Telegram Gold Group
- Priority support
Trust & presence
Gallery
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